diff --git a/docs/content/rules/sort-union-types.mdx b/docs/content/rules/sort-union-types.mdx
index afa3a6df..e057dc31 100644
--- a/docs/content/rules/sort-union-types.mdx
+++ b/docs/content/rules/sort-union-types.mdx
@@ -165,6 +165,18 @@ type CarBrand =
 
 Each group of union types (separated by empty lines) is treated independently, and the order within each group is preserved.
 
+### newlinesBetween
+
+<sub>default: `'ignore'`</sub>
+
+Specifies how new lines should be handled between union type groups.
+
+- `ignore` — Do not report errors related to new lines between union type groups.
+- `always` — Enforce one new line between each group, and forbid new lines inside a group.
+- `never` — No new lines are allowed in union types.
+
+This options is only applicable when `partitionByNewLine` is `false`.
+
 ### groups
 
 <sub>
@@ -314,8 +326,9 @@ Determines the matcher used for patterns in the `partitionByComment` option.
                   order: 'asc',
                   ignoreCase: true,
                   specialCharacters: 'keep',
-                  partitionByNewLine: false,
                   partitionByComment: false,
+                  partitionByNewLine: false,
+                  newlinesBetween: 'ignore',
                   matcher: 'minimatch',
                   groups: [],
                 },
@@ -342,8 +355,9 @@ Determines the matcher used for patterns in the `partitionByComment` option.
                 order: 'asc',
                 ignoreCase: true,
                 specialCharacters: 'keep',
-                partitionByNewLine: false,
                 partitionByComment: false,
+                partitionByNewLine: false,
+                newlinesBetween: 'ignore',
                 matcher: 'minimatch',
                 groups: [],
               },
diff --git a/rules/sort-union-types.ts b/rules/sort-union-types.ts
index 4532526e..c79feaa1 100644
--- a/rules/sort-union-types.ts
+++ b/rules/sort-union-types.ts
@@ -1,9 +1,12 @@
 import type { SortingNode } from '../typings'
 
+import { validateNewlinesAndPartitionConfiguration } from '../utils/validate-newlines-and-partition-configuration'
 import { validateGroupsConfiguration } from '../utils/validate-groups-configuration'
 import { hasPartitionComment } from '../utils/is-partition-comment'
 import { sortNodesByGroups } from '../utils/sort-nodes-by-groups'
 import { getCommentsBefore } from '../utils/get-comments-before'
+import { makeNewlinesFixes } from '../utils/make-newlines-fixes'
+import { getNewlinesErrors } from '../utils/get-newlines-errors'
 import { createEslintRule } from '../utils/create-eslint-rule'
 import { getLinesBetween } from '../utils/get-lines-between'
 import { getGroupNumber } from '../utils/get-group-number'
@@ -16,7 +19,11 @@ import { makeFixes } from '../utils/make-fixes'
 import { complete } from '../utils/complete'
 import { pairwise } from '../utils/pairwise'
 
-type MESSAGE_ID = 'unexpectedUnionTypesGroupOrder' | 'unexpectedUnionTypesOrder'
+type MESSAGE_ID =
+  | 'missedSpacingBetweenUnionTypes'
+  | 'unexpectedUnionTypesGroupOrder'
+  | 'extraSpacingBetweenUnionTypes'
+  | 'unexpectedUnionTypesOrder'
 
 type Group =
   | 'intersection'
@@ -37,6 +44,7 @@ type Options = [
   Partial<{
     type: 'alphabetical' | 'line-length' | 'natural'
     partitionByComment: string[] | boolean | string
+    newlinesBetween: 'ignore' | 'always' | 'never'
     specialCharacters: 'remove' | 'trim' | 'keep'
     matcher: 'minimatch' | 'regex'
     groups: (Group[] | Group)[]
@@ -125,6 +133,12 @@ export default createEslintRule<Options, MESSAGE_ID>({
               'Allows to use spaces to separate the nodes into logical groups.',
             type: 'boolean',
           },
+          newlinesBetween: {
+            description:
+              'Specifies how new lines should be handled between object types groups.',
+            enum: ['ignore', 'always', 'never'],
+            type: 'string',
+          },
         },
         additionalProperties: false,
       },
@@ -134,6 +148,10 @@ export default createEslintRule<Options, MESSAGE_ID>({
         'Expected "{{right}}" ({{rightGroup}}) to come before "{{left}}" ({{leftGroup}}).',
       unexpectedUnionTypesOrder:
         'Expected "{{right}}" to come before "{{left}}".',
+      missedSpacingBetweenUnionTypes:
+        'Missed spacing between "{{left}}" and "{{right}}" types.',
+      extraSpacingBetweenUnionTypes:
+        'Extra spacing between "{{left}}" and "{{right}}" types.',
     },
   },
   defaultOptions: [
@@ -159,6 +177,7 @@ export default createEslintRule<Options, MESSAGE_ID>({
         order: 'asc',
         groups: [],
         matcher: 'minimatch',
+        newlinesBetween: 'ignore',
         partitionByNewLine: false,
         partitionByComment: false,
       } as const)
@@ -182,6 +201,7 @@ export default createEslintRule<Options, MESSAGE_ID>({
         ],
         [],
       )
+      validateNewlinesAndPartitionConfiguration(options)
 
       let sourceCode = getSourceCode(context)
       let partitionComment = options.partitionByComment
@@ -277,17 +297,41 @@ export default createEslintRule<Options, MESSAGE_ID>({
 
       for (let nodes of formattedMembers) {
         let sortedNodes = sortNodesByGroups(nodes, options)
+
         pairwise(nodes, (left, right) => {
+          let leftNum = getGroupNumber(options.groups, left)
+          let rightNum = getGroupNumber(options.groups, right)
+
           let indexOfLeft = sortedNodes.indexOf(left)
           let indexOfRight = sortedNodes.indexOf(right)
+
+          let messageIds: MESSAGE_ID[] = []
+
           if (indexOfLeft > indexOfRight) {
-            let leftNum = getGroupNumber(options.groups, left)
-            let rightNum = getGroupNumber(options.groups, right)
+            messageIds.push(
+              leftNum !== rightNum
+                ? 'unexpectedUnionTypesGroupOrder'
+                : 'unexpectedUnionTypesOrder',
+            )
+          }
+
+          messageIds = [
+            ...messageIds,
+            ...getNewlinesErrors({
+              left,
+              leftNum,
+              right,
+              rightNum,
+              sourceCode,
+              missedSpacingError: 'missedSpacingBetweenUnionTypes',
+              extraSpacingError: 'extraSpacingBetweenUnionTypes',
+              options,
+            }),
+          ]
+
+          for (let messageId of messageIds) {
             context.report({
-              messageId:
-                leftNum !== rightNum
-                  ? 'unexpectedUnionTypesGroupOrder'
-                  : 'unexpectedUnionTypesOrder',
+              messageId,
               data: {
                 left: toSingleLine(left.name),
                 leftGroup: left.group,
@@ -295,8 +339,16 @@ export default createEslintRule<Options, MESSAGE_ID>({
                 rightGroup: right.group,
               },
               node: right.node,
-              fix: fixer =>
-                makeFixes(fixer, nodes, sortedNodes, sourceCode, options),
+              fix: fixer => [
+                ...makeFixes(fixer, nodes, sortedNodes, sourceCode, options),
+                ...makeNewlinesFixes(
+                  fixer,
+                  nodes,
+                  sortedNodes,
+                  sourceCode,
+                  options,
+                ),
+              ],
             })
           }
         })